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-rw-r--r--block/genhd.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 5f73c24..cd65b97 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -423,14 +423,18 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
do {
if (!idr_pre_get(&ext_devt_idr, GFP_KERNEL))
return -ENOMEM;
+ mutex_lock(&ext_devt_mutex);
rc = idr_get_new(&ext_devt_idr, part, &idx);
+ mutex_unlock(&ext_devt_mutex);
} while (rc == -EAGAIN);
if (rc)
return rc;
if (idx > MAX_EXT_DEVT) {
+ mutex_lock(&ext_devt_mutex);
idr_remove(&ext_devt_idr, idx);
+ mutex_unlock(&ext_devt_mutex);
return -EBUSY;
}
@@ -655,7 +659,6 @@ void del_gendisk(struct gendisk *disk)
disk_part_iter_exit(&piter);
invalidate_partition(disk, 0);
- blk_free_devt(disk_to_dev(disk)->devt);
set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
@@ -674,6 +677,7 @@ void del_gendisk(struct gendisk *disk)
sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
pm_runtime_set_memalloc_noio(disk_to_dev(disk), false);
device_del(disk_to_dev(disk));
+ blk_free_devt(disk_to_dev(disk)->devt);
}
EXPORT_SYMBOL(del_gendisk);